Lock



June 1938' J. H. MILLIGA'N 2,119,866-

LOCK

Filed June 10, 1956 I 4 She ets-Sheet 1 invenTor v doseph H. Miiligqn MWAQW ys June 7, 1938. J. H. MILLIGAN LOCK Filed June 10, 1936 4 4 Sheets-Sheet 2 s v/ .D H T. on TO Hi. m W 5. 8 w 7 $1 w w F n v U 7 b 4 4 5 4 w kw-J June 7, 1938.

J. H. MILLIGAN 2,119,866

LOCIK Filed June 10, 1936 4 Sheets-Shet s byWMk June 7, 19338. J. H. MILLIGAN LOCK Filed June 10, 1936 4 Sheets-Sheet 4 InQenTorQ Uoseph HMIIIigcm J IY Patented June 7, 1938 UNITED STATES PATENT OFFICE 15 Claims.

This invention relates to locks and particularly to looks of the tumbler pin type.

One of the objects of the invention is to provide a lock of this type which includes in its construction a plurality of separate key plugs, each operable with a different key, and through the operation of any one of which the lock may be released. This provides a lock having one key which may be used by the tenant or the person regu larly occupying the room with which the lock is provided, and one or more master keys which can be used by some other person or persons who are authorized to enter the room. In the embodiment of the invention illustrated there are three such key plugs, thus providing for a regular key for unlocking the door and two differently-cut master keys.

My invention is well adapted for the type of lock in which the key plug and tumbler pins are located within the knob.

Another object of the invention is to provide a novel lock in which the knobhas enclosed therein the several separate key plugs controlling the operation of the lock. 25 In the embodiment of the invention illustrated the lock within the knob normally locks it from being rotated, and another object of the invention is to provide a novel lock in which the .mere insertion of a key in one of the key plugs will release the look.

A further object of the invention is to provide a novel lock having the above construction in which in order to release the look by means of either one of the master keys it is necessary to insert the master key in its key plug and then turn the plug within the knob, the turning of the plug raising up the locking pins and thus releasing the look.

A further object of the invention is to provide a novel lock of this type having two knobs, one on each side of the door or other element to which the lock is applied, and also having a single one-piece spindle for withdrawing the bolt, and which is constructed so that the door can always be opened by turning the knob on the inside of the door notwithstanding the fact that the knob on the outside of the door is locked from rotation.

- A further object of the invention is to provide a novel lock having a plurality of separate key plugs for releasing the lock, each of which key plugs is constructed so that by giving it a partial rotation and withdrawing the key the lock may be held in its released condition so that the outside knob is free to be turned for opening the door.

A still further object of the invention is to provide a novel lock of this type in which the angular position of the spindle relative to the outside knob may be changed to provide for using the spindle in the hub of a roll-back whether the flat sides in the opening of the hub have a horizontal and vertical arrangement or a 45 arrangement.

Still further objects of the invention are to improve generally locks of this type in particulars more fully hereinafter set forth.

In the drawings wherein I have illustrated some embodiments of the invention,

Fig. 1 shows in vertical section a lock embodying my invention as applied to a door.

Fig. 2 is a section on the line 2-2, Fig. 1.

Fig. 3 is a fragmentary sectional view showing theusual bolt and roll-back for withdrawing the bolt.

Fig. 4 is a view on the line 55, Fig. 1 showing the spindle and disk 35 in elevation.

Fig. 5 is also a view on the line 55, Fig. 1 showing the spindle and disk 35 removed.

Fig. 6 is a section on the line 66, Fig. 1.

Fig. '7 is a section on the line 11, Fig. 6.

Fig. 8 is also a section on the line 6--6, Fig. 1, but showing the lock released through the operation of one of the master keys.

Fig. 9 is a section through the knob on the line 9-9, Fig. 17 showing the main key plug turned into a position to hold the knob unlocked.

Fig. 10 is a section of the sectional View through the inside knob.

Fig. 11 is an end view of the inside knob.

Fig. 12 is a sectional view through the escutcheon member on the inside of the door taken on the line l2-l2, Fig. 2.

Fig. 13 is a section on the line l3-l3, Fig. 12.

Fig. 14 is a sectional view of the outside knob showing the tumbler pins lined up and the knob unlocked by the insertion of the key.

Fig. 15 is a fragmentary view showing the manner of attaching the knob support to the outside escutcheon member. 45

Fig. 16 is a section on the line Iii-l6, Fig. 8.

Fig. 17 is an end view of theouter knob.

Fig. 18 is a top plan view of the body portion IQ of the outer knob with the backing plate 95 removed.

Fig. 19 is a section through the outer knob on the line 9-9, Fig. 17, but showing the knob unlocked by turning the inner knob.

Fig. 20 shows a modified form of the invention wherein the outer knob has a single key plug therein.

Fig. 21 is a section on the line 2l2|, Fig. 20.

Fig. 22 is a fragmentary sectional view showing the manner of coupling the outer knob to the spindle.

Referring to Figs. 1 and 3 of the drawings, l indicates a sectional view of a door or other element to which my improved lock is applied. This door is equipped with a locking bolt 2 by which the door is locked, said locking bolt having any suitable or usual construction and being shown as enclosed in a casing 3 set into the door I. The bolt 2 is provided with the usual spring 4 for throwing it forward and it is withdrawn through the medium of the usual roll-back 5 mounted on the spindle 6 of the door-knob structure, said "spindle having the usual square cross section which fits. the square opening I in the hub 8 of the roll-back.

The parts thus .fardescribed are of common construction and form no part of my present invention. The lock structure herein illustrated comprises an innerknob 9 secured to the inner end of the spindle 6 and situated on the inside of the door and an outer knob member It! on the outside of the door, which outer knob member is normally locked from rotation, and suitable driving connections between the outer knob member and the spindle S by which the spindle may be turned towithdraw the bolt 2 when the outer knob is unlocked.

The outer knob member ID is rotatably mounted on a stationary knob-supporting member which comprises a cylindrical portion II situated axially within the knob and on which the knob is adaptedto turn, and a head or disk portion 12 that is fixed to an outer hub or escutcheon member l3 by means of suitable screws H (see Fig. 15), said escutcheon member 13 being secured to the outside of the door I by means of screws l5. These screws. I5 extend through the door and the heads thereof are seated in a plate l6 lying against the inside of the door, said screws extendingthroughthe plate and the door and being screw-threaded into the outer hub or escutcheon member l3, as best seen in Fig. 1.

The knob-supporting member ll, I2 is, therefore, rigidly secured to the door and is a stationary element.

The outside knob member ID comprises the shell .portion l8 and the body or tumbler-pinreceiving. portion [9, said shell and body being rigidly connected together. The body or tumblerpin-receiving' portion I9 is provided with a central opening in which the cylindrical portion ll of the knob-supporting member is received. The knob is retained on the knob-supporting member by means of screws 2| extending radially through the shell portion l8 near its rear end and having their tips 22 received in a groove 23 formed in the periphery of the disk portion I2 of said knob-supporting member.

The knob, when unlocked, can thus rotate on the knob-supporting member but cannot be withdrawn therefrom.

The cylindrical portion H of the knob-supporting-member has a central bore in which is received a key plug 24 provided with a key slot 25.

The knob I0 is normally locked to the portion H of the stationary knob-supporting member by a tumbler pin construction which is designed not only to lock the knob to the stationary knob support but also tolock the key plug 24 thereto.

This tumbler pin construction comprises a plurality of tumbler pins 26,'each divided into three sections, a setting section 21 located within the key plug 24, a follower or looking section 28 carried by the knob and when operative adapted to project into the stationary member II, as shown in Fig. 1, thereby locking the knob from rotation, and an intermediate section 29 having the same length as the thickness of the wall of the member ll. Each pin is acted upon by the usual spring 30 which holds it in its operative or looking position.

It will be understood from the above that when there is no key in the slot the springs hold the tumbler pins in their depressed position so that the inner ends of the outer follower or locking sections of the pins extend into the portion H of the stationary knob-supporting member, and the intermediate sections 29 are located partly in the stationary member I l and partly in the key. plug 24, thereby locking both the knob l0 and the key plug.

When a proper key 3| is inserted into the key slot 25 the tumbler pins are lined up, as shown in Fig. 14, thereby unlocking both the knob 10 and the key plug 24. When the pins are thus lined up the line of division between the tumbler sections 21 and intermediate sections 29 are lined up with the periphery of the key plug and the division line between the outer or follower sections 28 and they intermediate sections 29 are in line with the outer periphery of the portion ll of the knob-supportingrmember, and, as stated above, both the knob and the key plug 24 are free for turning movement.

A driving connection is provided between the knob l0 and the spindle 6 so that when the knob is unlocked a turning movement thereof will rotate the spindle and thus withdraw the bolt 2. This driving connection is shown in the form of a projection 32 extending from the rear of the body portion IQ of the knob I0 through an elongated opening or slot 33 in the disk or head portion l2 of the knob-supporting member and into an opening 34 formed in a head or disk 35 which is fast toone end of the spindle 6. This disk or head 35 is r'eceived'in a recess 36 with which the escutcheon member I3 is provided.

Whenth'e knob I0 is unlocked and is then given a turning movement the projection 32 engages the wall of the opening 34, thereby turning the disk 35 and the spindle 6 with the result that the bolt 2 will be withdrawn.

It will be observed from the above that the releasing of the lock for the knob I0 is accomplished simply by inserting the key 3| in the key slot 25 and that the withdrawing of the bolt 2 is accomplished by the turning of the unlocked knob Ill. The advantage of this is that in opening the doorthe key 3! is not subjected to any turning or twisting strain such as would be required to withdraw the bolt 2, since the force requiredto withdraw this bolt 2 is applied there to through the unlocked knob I0 and not through the key.

The lock'is further constructed so that by inserting the key in the key plug 24 and giving said key plug a half turn the key may be withdrawn, and the lock for the knob will then be held released so that the door is unlocked and can be opened by anyone from the outside.

The body portion IQ of the knob is provided with a second set of sectional pins 31 which are locate'dopposite the pin sections 28, 29, each of said additional pins being divided into three sections, to wit, an outer section 38 which is acted on by the usual spring 39, a thin intermediate section 4!! and an inner section 4| which has a length equal to the thickness of the wall of the portion I of the knob-supporting member. When the key plug 24 is in the position shown in Fig. 1 the pin sections 4| occupy openings in the wall H of the knob-supporting member, and as said sections 4| have a length equal tothe thickness of this wall the sections 31 and 40 of each pin will be located entirely within the body l8. These pins are thus normally lined up to permit the knob ID to be rotated when the tumbler pins 29 are lined up by the insertion of the key 3|. When the key 3| is inserted into the key slot 25 and the plug 24 is given a half rotation into the position shown in Fig. 9, the setting sections 21 of the tumbler pins are in alignment with the'tumbler pins 31, thus permitting the key to be withdrawn from the key slot 25. As soon as the key is withdrawn the springs 39 force the pins inwardly, thereby carrying the pin sections 4| partially into the plug 24 and locking the plug from rotation. When the pins 31 are in their inward position the line of division between The sections 38 and 40 of each pin is at the periphery of the wall ll of the stationary knob-supporting member so that so far as the pins 31 are concerned the knob is free to be turned. As soon as the plug 24 is turned from the position shown in Figs. 1 and 14, the pin sections 29 will be held in their retracted position within the wall H by engagement with the periphery of the key plug 24, and thus after the key plug has been turned into the position shown in Fig. 9 and the key has been withdrawn the knob II] will be released and will be free to be turned for opening the door. The key plug 24 thus has two keyreceiving positions. One of these positions is that shown in Fig. 14 in which position the key 3| may be inserted to line up the tumbler pins and thereby to unlock the knob I8. The other key-receiving position is that shown in Fig. 9 in which the setting sections 21 of the tumbler pins are in alignment with the pins 31. The key 37 may be inserted into the key plug or withdrawn therefrom when the key plug is in either one of these two key-receiving positions.

I have stated above that the lock embodies a plurality of separate key plugs, each operable with its own key and through the operation of any one of which the knob I!) may be unlocked. In the embodiment of the invention herein shown there are three such key plugs, one of which is the key plug 24 that has been described above, and all of which are mounted within the knob l8. While I have shown two additional key plugs, however, I would state that the number of such additional key plugs may be varied without departing from the invention.

The two additional key plugs are indicated at 42 and 43, each of these plugs being mounted for rotation within the body portion 19 of the knob and the end of each key plug projecting through an opening in the end wall of the knob casing l8 and being flush therewith. These key plugs 42, 43 thus assist in securing the body portion l9 and casing l8 together to rotate as a unit. Each key plug 42, 43 is provided with the usual key slot 44 and the usual tumbler pins 45, each of which comprises the setting section 46 within the key plug and the spring-pressed follower or looking section 4! located in the body l9.

When the key is withdrawn the key plug (42 or 43) will be locked from rotation, as shown in Fig.

1'7, and the insertion of a suitable key in the key slot will line up the tumbler pins and thus unlock the plug so that it can be turned.

Means are provided whereby the turning of either key plug 42 or 43 operates to withdraw the locking pin sections 28 from the apertures in the wall ll of the stationary knob-supporting member, thereby releasing the knob so that it can be turned. The knob, therefore, can be unlocked either by inserting the key 3| in the slot of the central key plug 24 or by inserting the proper key in the slot of either key plug 42, 43 and then turning the plug within the knob. This provides for opening the door through the medium of the ordinary or change key 3| which would be in the possession of the tenant or occupant of the room, and also through either one of two master keys which will be difierently cut so that each master key will unlock one only of the key plugs 42, 43.

For withdrawing the pin sections 28 to release the knob I!) when either key plug 42 or 43 is turned there is provided a pin-lifting member 48 which is movable radially in a slot or opening 48 formed in the body l9 and which is provided with apertures into which the outer ends of the pin sections 28 extend. These pin sections are formed with heads or enlarged portions at their outer ends so that when the pin-lifting member 48 is moved outwardly, as shown in Figs. 8 and 19, the shoulders 5| of the pin-lifting member engage the heads 50 and thereby withdraw the sections 28 from the wall ll, thus unlocking the knob ID ,from the wall H of the stationary knob support, as seen in Fig. 19.

For this purpose the pin-lifting pin member 48 is provided on each side with a wing or extension 52 having at its lower end a lifting toe 53, and each key plug 42 or 43 is provided in its inner side with a groove 54 in which the corresponding toe 53 is normally received, as shown in Figs. 6 and '7.

If the key plug, as shown in Fig. 6, is given a clockwise turning movement the flat face 55 forming the bottom of the groove 54 has a camming action against the toe 53 which will raise the pinlifting block 48 into the position shown in Fig. 8, and when the key plug 43 has been given a half rotation, as shown in Fig. 8, the toe 53 will rest against the periphery of the plug and the pinlifting block will thereby be held in its raised position.

As stated above the raising of the pin-lifting block withdraws the pin sections 28 from the wall ll of the stationary knob-supporting member, thereby unlocking the knob In so that the knob is free to be turned to withdraw the bolt 2.

If it is desired to lock the door again after it has been opened then the key plug 43 is returned to its normal position shown in Fig. 6 to bring the groove 54 into register with the toe 53, thereby allowing the pin-lifting member 48 to move downwardly into the position shown in Fig. 6, and as this occurs the springs 38 will force the pin sections 28 into locking engagement with the wall The springs 38 are backed by a plate 95 secured to the body I9 by screws 96.

A rotation of the key plug 42 in a counter-clockwise direction will similarly raise the pin-lifting block 48 and release the knob I0, and thus it will be seen that the knob H) can be unlocked by turning either of the key plugs 42 or 43, it being necessary to turn one of the plugs (the plug 43) in a clockwise direction and the other plug (the plug 42) in a counter-clockwise direction.

' If it is desired to unlock the knob It by the use of either master key and'thento -leave'the door unlocked after withdrawing the key, then the key plug (42 or 43) is given a half rotation, ,as'shown by the key plug 43 in Fig. 8, and the key is then withdrawn. This will leave the key plug in the position shown by the key plug 43 in Fig. 8 and said key plug will hold the pin-lifting member .48 raised so that the knob lwill remain unlocked until the key is again inserted in the key plug and the latter returned to its normal position shown in Fig. 8.

To provide for thus withdrawing the master key with the key plug in the position shown .by the key plug 43 in Fig. 8 the body.|9 of the knob 19 is provided with a duplicate set of springpressed follower pins 55 (see Fig. 16) situated opposite to the pins 45 so that when the plug 43 or 42 has been given a half rotation the setting pin sections 46 are in line with the duplicate follower pin sections 56, thus permitting the key to be withdrawn; These duplicate follower sections 58 serve also to lock the plug from rotation until the key is again inserted therein to line up the tumbler pins. Each of the key plugs 42, 43 also has two key-receiving positions. One of these positions is that shown in Fig. 6, and the other of these positions is that shown in Fig. 8 with respect to the plug 43. The proper key can be inserted into or withdrawn from either key plug 42 or 43 when it is in either one of these two key-receiving positions.

From the above it will be understood that the lock herein shown is one in which the knob H) can be unlocked either by simply inserting a key 3| in the key slot of the plug 24, or by rotating the key plug 42 in a counter-clockwise direction by means of its master key or by rotating the plug 43 by its master key in a clockwise direction. Since the master key combinations are entirely separate from the combinations of the regular key 3| it follows that it is possible to make a lock embodying my invention with a master key which will control a much larger number of combinations than a master keywhich is used in the same key plug as the regular key.

My improved lock is also constructed so that the door can always be opened by turning the inside knob 9, the construction being such that the initial turning of the knob 9 in either direction serves to raise or retract the pin-lifting member 48 thereby to unlock the knob I 0, and further rotative movement of the inside knob turns the spindle to withdraw the bolt 2, th knob ID turning with the spindle.

A stationary escutcheon member 64 is attached to the door on the inside thereof and is situated between the inner knob 9 and the door, the construction of which escutcheon member being presently described. The knob 9 has a plate 56 secured to its inner face by means of screws 61, and this plate is provided with a hub 68 having a square opening therein to fit the square shape of the spindle 6 so that rotation of the knob will turn the spindle. The knob 9 is retained on the spindle through the medium of a cup-shaped member 69 which is rotatably mounted within the knob 9 and is provided with interior screw threads 19 adapted to engage screw threads H formed on the corners of the spindle 6. This cup-shaped member 69 has an extension 12 which is exposed at the face 13 of the knob 9 and comes flush with said face, said extension having a screw-driver slot '14 therein. This cup-shaped member 89 is thus retained in .position between the plate 65 and the shoulder 15 on the interior of the knob19,but it maybe rotated within the knob by inserting a screw-driver or other implement in the slot .14. The member 69 functions as a nut which has screw-threaded engagement with the spindle 6, and byturning the cup-shaped member 89 within the knob said member will be screw-threaded to the spindle, thereby securing the knob 9 thereto. Since the opening in the hub'68 of the plate 66 fits the square shape of the spindle the knob cannot rotate on the spindle but simply moves lengthwise of the spindle as the cup-shaped member 69 is turned. In order to avoid the unsightly appearance which the screw-driver slot 14 would 'give if it were exposed I propose to employ a filler 16 for said screw-driver slot, said filler normally occupying the slot and being held in its operative position by means of a spring "which encircles the cupshaped member 89 and is confined between the plate .66 and arms 18 extending from the rear .end of the filler 16. Normally the spring presses the arm 18 against the shoulders 15, thereby keeping the .outer end of the filler flush with the face of the knob, in which position the filler completely fills the screw-driver slot 14. When it is desired to remove the knob or adjust it on the spindle a screw-driver 19, shown in dotted lines, Fig. 11, may be pressed against the filler forcing it inwardly against the action of the spring .11, thereby allowing the screw-driver to enter the slot 14. When the proper adjustment has been made and the screw-driver has been removed the spring 11 will restore the filler to its normal position filling the screw-driver slot 14.

It-will be remembered that the spindle 6 has fast thereto the disk 35 provided with an opening 34 in which is received the projection 32 carried by the body 19 of the knob ID. This projection 32 is formed .on a yoke member 5.1, the legs 58 of which straddle the pin-lifting block 48, as shown in Figs. to'8, said yoke being pivotally mounted at .59 on the body IS. The two legs 58 of the yoke are situated beneath and engage pins or projections 60 extending laterally from the pinliftingmember 4.8 so that a turning of the yoke about its pivot 59 in a, counter-clockwise direction, Fig. 7, will raise the pin-lifting member '48.

The opening 34 in the disk 35 (see Fig. 4) is shaped to present a cam surface 6| .on each side thereof. When-the inner knob9 is given its initial turning movement in either direction the resulting initial turning movement of the spindle -6 and disk 35 will cause one or the other cam surface Bl to engage the projection 32, thereby swinging the yoke 51 about its pivot 59 into the position shown in Fig. 16 and raising the pin-lifting block 48 as above-described. This unlocks the knob l0 and the inner knob -9 may then be turned sufficiently further-t0 withdraw the bolt 2. Enclosed within the escutcheon member 64 is a centering spring 63 by which the inner knob 9 is returned to'its normal position after it has been turned in either direction for opening the door. This spring is located in an annular recess 65 with which the escutcheon member '64 is provided,-the two ends of the spring normally resting against the end .walls 89 of said recess. Mounted on the spindle -6 forturningmovement therewith is .:a diskfll, said disk having a square opening therein fitting the square shape of the spindle. .'Ihis.disk;is provided withanarm 82 which is situated between-the two ends of the spring 63. When the knob is turned ineither direction'the arm bears against one end of the spring .83 and compresses .the latter, the other end of said spring being retained against the shoulder at one end of the recess 65. As soon as the knob is released, however, the spring 63 expands and returns the knob and spindle to their normal position.

The escutcheon member 64 is removably se cured to the plate 15. For this purpose said plate is provided with a rib 83 which sets in a groove in a plate 84 that is secured to theinner side of the escutcheon member 64 by screws 85. This rib has an extension 86 which fits into a notch or groove l8! formed in the escutcheon member 64, and a screw 81 extends through the escutcheon member and plate 84 and screw threads into the plate I6, as shown in Fig. 13. Said screw 81 and the toe or projection 86 serve to rigidly connect the escutcheon member 64 to the plate l6 and thus to the door. The disk 8!, however, is free to rotate within the escutcheon member as above described.

Sometimes locks for doors are made with the square hole through the hub 8 of the roll-back 5 with the fiat sides extending at the 45 angle, as shown in Fig. 3, and sometimes they are made with the fiat sides extending horizontally and vertically. In applying a knob and lock embodying my invention to a door which has the bolt 2 and roll-back therein it is desirable that the outer knob should be so positioned that the three key plugs therein will occupy a horizontal position, and in order to adapt my lock for a door wherein the fiat sides in the hub of the roll-back are in the horizontal and vertical position as well as to a roll-back in which the fiat sides are in the 45 position, I have provided a construction whereby the relative annular positions of the spindle 6 and the knob ID may be changed to suit either type of roll-back. For this purpose the disk 35 which is attached to the end of the spindle is provided with two similar openings 34 situated apart, as shown in Fig. 4, and said disk is also formed with a hub portion 88 which is received in the inner end of the plug-receiving bore of the stationary knob-supporting member ll, l2. The disk 35 is yieldingly held against the knob 40 by means of a spring 89 that is situated in a recess 56 formed in the escutcheon member I3 and which acts against a disk 9| that in turn rests against the disk 35.

When the parts of the lock are assembled with the projection 32 occupying one of the openings 34 in the disk 3-5 the spindle will be so positioned relative to the knob It that when the knob is situated with the three plugs horizontal the flat faces of the spindle will have the position shown in Fig. 3.

On the other hand, if the parts are assem bled so that the projection 32 occupies the other aperture 34, then the spindle 6 will have such relation to the knob ID that when the knob is positioned with the three plugs in horizontal alignment the flat faces of the spindle will have horizontal and vertical positions.

In Figs. 20, 21 and'22 I have shown a modification of the invention wherein the key plugs for the master keys are omitted. 7

In said figures a portion of the spindle and the outer knob only are shown. The spindle is indicated at 6 and it and the inner knob 9 and the bolt 2 may have the same construction as illustrated in Fig. 1.

In the construction shown in Figs. 20, 21 the outer knob is indicated at I00 and it is rotatably mounted on the stationary knob-supporting member I I, I2 having the same construction as that illustrated in Figs. 1 to 19, said stationary knob-supporting member being secured to the outer escutcheon member H which in turn is fastened to the door.

Situated within the cylindrical portion H of the knob-supporting member is a key plug I 02 having the key slot I03.

The outer knob is normally locked to the cylindrical wall I! by means of the pins I04, each pin having the setting section I05 located Within the key plug H52, the locking section I05 situated within the body of the knob and acted on by the spring H3? and an intermediate section I08 which has a length equal to the thickness of the wall it, these pins being so constructed that when the proper key is inserted in the key slot the pins are lined up so that the line of division between the setting sections and the intermediate section I08 is in alignment with the outer periphery of the key plug, and the line of division between the intermediate section "18 and the locking section I55 is in alignment with the outer periphery of the cylindrical portion ll,

whereby the knob IE8 is unlocked.

Said knob 00 has a projection H18 extending therefrom and into a semi-circular slot H0 formed in a disk HI fastened to the end of the spindle 5, said disk I I I occupying a recess formed in the escutcheon member illl. Normally the projection N39 has a position at the end of the slot H0, as shown in Fig. 22. 7

When the proper key is inserted in the key slot I53 the pins 34 are lined up and the knob IE5 is then free to be turned. By turning the knob in a clockwise direction, Fig. 22, the projection I99 will actuate the disk Hi and thereby turn the spindle B to withdraw the bolt 2. j

The spindle 6 can be turned, however, in a clockwise direction, Fig. 22, even when the outer knob is locked because of the presence of the slot H0, and, therefore, a person on the inside of the room can always open the door by'turning the knob 9 in a direction to turnthe spindle in a clockwise direction, Fig. 22, regardless of whether the outer knob is locked or unlocked.

I claim: I

1. A door lock comprising a stationary knob: supporting member adapted to be secured to a door, a knob rotatably mounted on said knobsupporting member, a lock for locking said knob 1 to said knob-supporting member and comprising a key plug carried by the knob-supporting member and having a key slot, sectional tumbler pins in said knob and key plug which are lined up by the insertion of the key in the key slot, thereby releasing the knob, and a bolt connected to the knob to be actuated thereby independently of the key plug.

2. A door lock comprising a stationary knobsupporting member having a hollow cylindrical n Portion, a'knob rotatably mounted on said cylindrical portion, a key plug mounted within said cylindrical portion and having a key slot, sectional tumbler pins in the knob and key plug, which pins are lined up by the insertion of the key in the key slot, thereby unlocking the knob from the knob-supporting member, a bolt, and means to withdraw'the bolt by turning movement of the knob. I

3. A door lock comprising a stationary knobsupporting member, means for securing the latter to the door, a knob rotatably mounted on said knob-supporting member, a series of springpressed locking pins carried by the knob and normallyhaving interlocking engagement with ,a door, a knob rotatably mounted on said knobsupporting member, a key plugrotatably mounted in the knob-supporting member and having a key slot, locking pins normally locking both the knob and the key plug to the knob-supporting member, which pins are lined up to unlock both the knob and the key plug by the insertion of a 1' key in the key slot.

5. A lock comprising a stationary knob-supporting member, means for securing the same to a door, and key plug carried by the knob-supporting member and having a key slot, a knob mounted on the knob-supporting member for turning movement independently of the key plug, locking pins normally locking both the knob and the key plug to the knob-supporting member, which pins are lined up to unlock both the knob and the key plug by the insertion of a key in the key slot, a bolt for the door, a spindle for withdrawing the bolt, and means to turn the spindle by turning movement of the knob.

6. A door lock comprising a knob-supporting member, means for securing the same to the outer side of the door, an outer knob rotatably mounted on the knob-supporting member, a locking pin normally locking the knob to the knob-supporting member, a key plug rotatably carried by the knob, and means to withdraw the locking pin from the knob-supporting member by rotation of said key plug.

'7. A door lock comprising a knob-supporting member, means for securing the same to the outer side of the door, an outer knob rotatably mounted on the knob-supporting member, locking pins normally locking the knob to the knobsupporting member, a plurality of separate key plugs rotatively carried by the knob and capable of being independently operated, and means actuated by the rotation of any one of the key plugs to withdraw the locking pins from the knob-supporting member.

8. A door lock comprising a stationary knobsupporting member, means securing the latter to the door, a knob rotatably mounted on said knob-supporting member, a plurality of locking pins carried by the knob and normally locking the same to the knob-supporting member, a pinlifting block for withdrawing the pins from the knob-supporting member, a key plug rotatably carried by the knob, and means to raise the pinlifting block by rotation of the key plug-thereby to release the knob for turning movement.

9. A door lock comprising a stationary knobsupporting member, means securing the latter to the door, a knob rotatably'mountedon said knobsupporting member, a plurality of locking pins carried by the knob and normally locking the same to the knob-supporting member, a pinlifting block for with-drawing the pins from the knob-supporting member, a plurality of key plugs carried by the knob, andmeans to raise the=pinlifting block by rotation of any key plug, thereby to release the knob for turning movement.

10. A door lock comprising a knob-carrying member stationarily secured to the outer side of the door, an outer knob rotatably mounted thereon, locking pins for locking said knob to the knob-supporting member, a pin-lifting block for releasing the pins from the knob-supporting member,a key plug rotatably carried by the knob, means to raise the pin-lifting block by rotation of the key plug, a bolt-actuating spindle extending through the door, an inner knob carried by said spindle on the inside of the door, means to turn the spindle by turning movement of the outer knob after the latter has been unlocked; and means for raising the pin-lifting block by initial turning movement of the inner knob;

'11. A door lock comprising a stationary knobsupporting member adapted to be secured to a door, a knob rotatively mounted on said knobsupporting member, and lock for locking said knob to said knob-supporting member and comprising a key plug rotatively carried by the knobsupporting member and having a key slot, said plug being turnable into either one of two keyreceiving positions, sectional tumbler pins in said knob and key plug which are lined up by the insertion of a key in the key slot when the plug is in one key-receiving position, whereby the-knob is released, a bolt connected to the knob to be actuated thereby independently of the key plug, and means to hold the tumbler pins out of operation when the key plug is in its other keyreceiving position.

1-2. A door lock comprising a stationary knobsupporting member, means for securing the latter to a door, a knob rotatively mounted on said knob-supporting member, a series of springpressed locking pins carried by the knob and normally having interlocking engagement with the knob-supporting member, a key plug rotatively mounted in the knob-supporting member and having a key slot, said key plug being capable of being turned independently of the knob into either one of two key receiving positions, means for releasing the locking pins from the knobsupporting member by the insertion of a key in the key slot when the plug is in one key-receiving position, and means operative when the key plug is in the other receiving position'to hold the locking pins released.

13. A door lock comprising a knob-supporting member, means for securing the same to the outer side of a door, an outer knob rotatively mounted on the knob-supporting member, looking pins normally locking the knob to the knobsupporting member, a keyplug rotatably carried by the knob and turnable into either one of two key-receiving positions, means to withdraw the locking-pins from the knob-supporting member by rotation of said key plug from one keyreceiving position to the other, and means to maintain said pins so withdrawn so long as the key plug remains in said other key-receiving position.

14. A door lock comprising a knob-supporting member, means for securing the same to a door, a knob rotatably mounted on the knob-supporting member, locking pins normally locking the knob to the knob-supporting'member, a plurality of separate key plugs rotatably carried by the knob and capablerof being independently operated, each key plug being turnable into either one of two key-receiving positions, means actuated by the rotation of any one of the key plugs from one'key-receiving position into the other keyreceiving position to withdraw the locking pins from the knob-supporting member, and means to maintain said pins so withdrawn until the key plughas been returned to the first named keyreceiving'position.

15. A door lock comprising a knob-supporting member, means for securing the same to the outer side of the door, a knob rotatably mounted on the knob-supporting member, locking pins normally locking the knob to the knob-supporting member, a plurality of separate key plugs rotatably carried by the knob and capable of being independently operated, means actuated by the rotation of any one of the key plugs to withdraw 10 the locking pins from the knob-supporting member, a bolt-actuated spindle extendingthrough the door and having a portion square in cross section, a roll back on the square portion of the spindle, and means for connecting the knob to the spindle when the latter is. normally in either a position with the sides of the square portion extending horizontally and vertically or in a position with the sides of the square portion at 45 degrees to the vertical.

JOSEPH H. MILLIGAN. 

